资料来源 : Webster's Revised Unabridged Dictionary (1913)

Cyclostome \Cy"clo*stome\ (s?"kl?-st?m), Cyclostomous
\Cy*clos"to*mous\ (s?-kl?s"t?-m?s), a. (Zo["o]l.)
   Pertaining to the Cyclostomi.

资料来源 : WordNet®

cyclostome
     n : primitive aquatic vertebrate